It can't be that, because if you remember, Rainbow Dash got it because of flying, she 'discovered her need for speed' in the race.
edit: Derp, doubled 'in the race'
According to the top comment on the video that he posted(which says:
A few of the enemies that pop up in this level are
"Rainbow Western"
"Midnight Sparkle"
"Nightmarity"
"Nightmare is Magic"
My flank this isn't a Pony reference.)
I think it's related.